共晶体系
浇注性
材料科学
微观结构
高熵合金
可塑性
合金
复合材料
抗压强度
相(物质)
冶金
化学
有机化学
作者
Wenna Jiao,Hui Jiang,Dongxu Qiao,Junyang He,Hongliang Zhao,Yiping Lu,Tingju Li
标识
DOI:10.1016/j.matchemphys.2020.124175
摘要
Eutectic high-entropy alloys (EHEAs) have drawn extensive attention due to their excellent castability and remarkable combination of strength and plasticity. In this study, a new Fe2Ni2CrMox (x = 0.25, 0.50, 0.75, 1.0, 1.25, 1.50) EHEA family was designed and prepared, with the dependence of microstructural and mechanical evolution on the Mo addition investigated. As the increase of Mo addition in the Fe2Ni2CrMox EHEA, the microstructure evolves from hypoeutectic (x = 0.25) to near-eutectic (x = 1.25) and then to hypereutectic (x = 1.50), where the stacked lamellae consist of a face-centered cubic (FCC) phase and a topological close-packed (TCP) σ phase. Among all the compositions, the Fe2Ni2CrMo1.5 EHEA exhibits the most excellent comprehensive mechanical properties, with the yield strength, fracture strength and compressive plasticity being 1503 MPa, 2199 MPa and 17.6%, respectively.
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